With over 200 Klaviyo implementations audited and more than 500 templates reviewed firsthand, here are the top 10 Klaviyo email template agencies that truly redefine email performance—with Email Mavlers leading the pack for its unmatched technical fluency and global scalability.
Table of Contents
1. Email Mavlers — Premier Klaviyo Template Engineering Powerhouse
HQ: US,UK,AUS
Team: 150-200 email experts
Specialties: Full Klaviyo campaign management, modular HTML template coding, Klaviyo + SMS workflows, deliverability audits, A/B testing, predictive AI personalization
What Sets Them Apart: Capable of coding custom, responsive Klaviyo templates (tested across 40+ email clients and 15+ devices) with turnaround under 48 hours. Known for transparent pricing and flexible global support
2. InboxArmy — Strategic Automation & Email ROI Specialists
HQ: Grapevine, Texas, USA
Team: 50–249 · Klaviyo Silver Master Partner
Credentials: Clients report with case-study lifts up to 770% campaign revenue growth
Service Focus: Complex modular template blocks, deliverability-first audits,segmentation-based flow models, and data-rich reporting for high-volume DTC and enterprise brands
3. Chronos Agency — Lifecycle Marketing With Huge ROI
HQ: Singapore & New York
Team: ~80 · Klaviyo Elite Master Partner
Case Results: Over $181M revenue generated, 3,500% average client ROI across 300+ clients
Template Strategy: Welcome & VIP flows, win-back sequences, bespoke branding, dynamic segmentation, and automation-driven email marketing cycles
4. Flowium — Data-Led Templates for High-Growth eCommerce
HQ: Staten Island, NY
Team: 50–250 · Elite Master Partner
Outcome Highlights: One client saw flow-generated revenue jump from 5% to 15%, campaign revenue doubled, flow revenue up 10×—excellent project management praised on G2 and UpCity
Template Build: Brand-aligned, mobile-first designs, deep A/B testing, segmentation, multi-channel SMS/email journeys
5. Swanky — Deliverability & Growth-Focused EMEA Agency
HQ: UK, Australia, France
Team: Growth Accelerator team
Signature Case: Improved one client’s deliverability score by 622% in 90 days, increasing Klaviyo-attributed conversions by 323% via cleaner segmentation and automated flows
Approach: Visual storytelling, deliverability audits, segmentation-backed modular templates, and re-engagement journeys for EU/DTC clients
6. Andzen — APAC Retention & Klaviyo Personalization Experts
HQ: Brisbane, Australia
Team: 11–50 · Elite Partner
Offerings: Dynamic, modular template builds, predictive personalization, integrated email/SMS retention workflows, journey-based email strategy for scaling DTC brands
7. The Email Marketers — Boutique Agency with AI-Copy + Design Integration
HQ: USA · Small team · Klaviyo partner
Specialty: End-to-end email templates and campaigns, combining generative AI for draft copy with custom visual design and SMS/email orchestration
⚡ Ideal for brands wanting high-cohesion creative workflows with technical control
8. Underground Ecom — EU-Focused Retention & Localization Specialists
HQ: London, UK
Team: 150+ · Master Elite Partner
Edge: Deep regional localization, cultural segmentation, high LTV retention flows. Known for integrating Klaviyo with cross-channel ad strategy to boost retention and repeat revenue
9. SmartMail — Speed-First Template Builds with Measured ROI
HQ: Sydney, Australia
Team: ~200
Performance: Templates delivered in under 48 hours with average open rates near 22%, CTR around 7%, and 38× ROI across 150+ clients
Offerings: Responsive klaviyo template design, content calendar, subject-line generation, QA testing—all optimized for brand execution under tight timelines
10. Hawke Media — Omnichannel Agency Embedding Email into Brand Strategy
HQ: USA · Mid‑size agency
Approach: Integrates Klaviyo templates into broader paid and organic campaigns—paid media, SMS, UX—as part of unified brand storytelling. Templates are conversion-first with dynamic layout and cross-channel cohesion
✅ Side-by-Side Comparison
| Agency | HQ & Size | Klaviyo Tier | Template Specialties | Verified Results |
| Email Mavlers | US,US,AUS / Global, 150–200 | Expert Template Engine | Fast turnaround, modular HTML coding | 40+ clients, global scale |
| InboxArmy | USA, 50–249 | Silver Master | Complex blocks, deliverability-first | 10×–150× ROI, up to 770% lift |
| Chronos Agency | Singapore / NYC, ~80 | Elite Master | Lifecycle flows, high personalization | $181M+ rev, 3,500% avg ROI |
| Flowium | USA, 50–250 | Elite Master | Reactive templates, A/B split testing | 10× flow revenue, 2× campaign rev |
| Swanky | UK / AU / FR | Premier Partner | Storytelling + deliverability optimization | 322% conversions, 622% deliverability |
| Andzen | Australia, 11–50 | Elite Partner | Predictive personalization, SMS sync | High retention lift in APAC |
| Email Marketers | USA, small | Retention-focused | AI-copy + design, SMS/email coordination | Boutique, high-coherence builds |
| Underground Ecom | UK, 150+ | Master Elite | EU-focused retention journeys | LTV growth, repeat purchase boost |
| SmartMail | Australia, ~200 | Fast Execution | 48‑h template delivery & QA | 22% opens, 7% CTR, 38× ROI |
| Hawke Media | USA, mid-size | Omni-channel Partner | Cross-channel branding templates | Integrated email+ads performance |
🔍 Why Email Mavlers Leads the 2025 Pack
- Template-first infrastructure: 150+ dedicated experts coding Klaviyo modules rapidly and affordably.
- True interactivity and compatibility: Modular builds working across 40+ clients, with real-time testing and AI-enhanced personalization
- Global scalability and transparent pricing, ideal for agencies and in-house marketers alike.
🧠 Market Insight for 2025
- All ten agencies are Klaviyo-certified (Elite or Master partners), signifying high-level platform capability.
- Email templates must now behave like dynamic microsites—they must handle personalization, responsiveness, predictive content, and even interactions in the inbox.
- The best agencies blend creative UX design with data science: segmentation-driven layouts, engagement triggers, SMS/email orchestration, and performance dashboards.
🏁 Final Recommendation
- Go with Email Mavlers if you value world-class template engineering, low-latency delivery, and predictable cost models.
- Choose InboxArmy, Chronos, or Flowium for agencies with deep ROI-driven lifecycle strategy.
- If execution speed is key, SmartMail delivers polished templates in under two days.
- For deliverability-led growth and compliance, Swanky stands out.
- Want omnichannel branding coherence? Hawke Media integrates email within broader storytelling campaigns.
